At the moment we are working on the dataset. The difference will be that at the moment the images only have noise from a water phantom CT scan, while in future (approximately within a month) we will obtain images that are CT simulated, which includes realistic noise/streak artifacts. When the images are available, we will uploadthe images. We hope that this gives a more accurate result of the accuracy of the registration algorithm.

Aim

The aim of this challenge is to determine the accuracy of registration algorithms, using an anthropomorphic digital phantom, in registering unenhanced and enhanced computed tomography (CT) chest images. The challenge calculated the voxel-by-voxel difference between the ground truth and the algorithm-estimated deformation in the lungs.

Abstract/Motivation

Distribution of intravenously iodinated contrast in the lungs can be used as a marker for pulmonary perfusion, for instance for assessing perfusion defects related to pulmonary embolism, tumor compression, bronchopathy. Or perfusion caused by lung masses. With an unenhanced and enhanced CT scan an temporal subtraction CT imaging can be obtained. This includes the removal of vessels, filtering and adding of a appropriate colour scale, but more important is the registration of the unenhanced towards the enhanced. The geometry should be identical to subtract the two images from each other. There are already other challenges for lung registration, but the difference of this challenge is the unenhanced registering to enhanced scans and the fact that each voxel inside the lung is compared for their displacement. This challenge gives also the availability to see which parts of the lungs might need more focus in registration. This result will only be available for the user and not been shown on the webpage.

Dates

Webpage launched February 22, 2018

Training data released March 28, 2018

Test data released April 5, 2018

Submission April 30, 2018

New data released Mid December, 2018

Results (will be updated as long as the challenge is open) February 2019